I imagine quite a few have been started n the opposite side. Actually I agree with you in that a case for being a teetotaler cannot be made from scripture. My primary reason, at least in the past, for not drinking was simply, I do not like the taste of alcohol. That being said I have other reasons for advising folk not to drink:
1. I believe the health risks are greater than the health benefits.
2. There is no way to know who when beginning moderate or social drinking will become an alcoholic with severe consequences.
3. And in certain circumstances, especially in America, being seen drinking will have a negative impact on a person's witness. This is not true in Europe as far as I can tell.
I would not condemn a Christian who drinks socially nor would I chastise a Christian who dies not drink.
Funny you should mention Europe. I was in the Navy and went on several cruises to the Med, Middle East, the northern countries like Scotland, etc. Anyway, especially in Italy, France and Greece, drinking wine at meals was a staple item. It did not take long to learn that once I started, the better I felt, and the less I wanted to stop. The pattern continued, so I got rid of the habit. There is no way that one can say not even remembering how one got back to the ship is moderate drinking. Some of the guys had one glass of wine and stopped, but not me. I am just a lay person, but I would never had wanted my kids to see me like that. It bothers my wife to be around it, and that should be enough for any person.
This thought also has come to mind. If one is a Sunday School teacher for example, would it bother you to have a beer in your hand while teaching? To me, it is so much easier not to drink. It seems like to drink lots of conditions must be present that are complex. The two main ones are that one is really drinking in moderation, and, that in your presence, it is not a bad witness, nor does it bother anyone else's conscience.